164331774648 has 64 divisors (see below), whose sum is σ = 456563404800. Its totient is φ = 54766908000.

The previous prime is 164331774647. The next prime is 164331774661. The reversal of 164331774648 is 846477133461.

It is a happy number.

164331774648 is a `hidden beast` number, since 1 + 6 + 4 + 3 + 3 + 177 + 464 + 8 = 666.

It is a super-2 number, since 2×164331774648² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 164331774594 and 164331774603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164331774647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1119523 + ... + 1257773.

It is an arithmetic number, because the mean of its divisors is an integer number (7133803200).

Almost surely, 2^164331774648 is an apocalyptic number.

164331774648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

164331774648 is an abundant number, since it is smaller than the sum of its proper divisors (292231630152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164331774648 is a wasteful number, since it uses less digits than its factorization.

164331774648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143769 (or 143759 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 54.

The spelling of 164331774648 in words is "one hundred sixty-four billion, three hundred thirty-one million, seven hundred seventy-four thousand, six hundred forty-eight".